40 Words That Start With X

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When the lexicographer Dr. Samuel Johnson put together his Dictionary of the English Language in 1755, there weren't a lot of words that started with X; he even included a disclaimer at the bottom of page 2308 that read, “X is a letter which though found in Saxon words, begins no word in the English language.” Noah Webster went one better when he published his Compendious Dictionary in 1806 that included a single X-word, xebec, defined as “a small three-masted vessel in the Mediterranean Sea.” Although, by the time he compiled his landmark American Dictionary in 1828, that total had risen to 13.

X has never been a common initial letter in English, and even with today’s enormous vocabulary you can still only expect around 0.02 percent of the words in a dictionary to be listed under it. But why not try boosting your vocabulary with these 40 words that start with X.

1. X

On its own, the letter X is listed in the Oxford English Dictionary as a verb meaning “to cross out a single letter of type.” X. X. in Victorian slang meant “double-excellent,” while X. X. X. described anything that was “treble excellent.”

2. XANTHIPPE

Xanthippe was the name of Socrates’ wife, who, thanks to a number of Ancient Greek caricatures, had a reputation for henpecking, overbearing behavior. Consequently her name can be used as a byword for any ill-tempered or cantankerous woman or wife—as used in Shakespeare’s Taming of the Shrew.

3. XANTHOCOMIC

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Xanthos was the Ancient Greek word for yellow, and as such is the root of a number of mainly scientific words referring to yellow-colored things. So, if you’re xanthocomic, you have yellow hair; if you’re xanthocroic you have fair hair and pale skin; and if you’re xanthodontous, you have yellow teeth.

4. X-CATCHER

In old naval slang, an X-catcher or X-chaser was someone who was good at math—literally someone good at working out the value of x.

5. X-DIVISION

Victorian slang for criminals or pickpockets, or people who make a living by some underhand means.

6. X-DOUBLE-MINUS

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1960s slang for something really, really terrible.

7. XENAGOGUE

Derived from the same root as xenophobia, a xenagogue is someone whose job it is to conduct strangers or to act as a guide while…

8. XENAGOGY

… a xenagogy is a guidebook.

9. XENIAL

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The adjective xenial is used to describe a friendly relationship between two parties, in particular between a hospitable host and his or her guests, or diplomatically between two countries.

10. XENIATROPHOBIA

Don’t like going to see doctors you don’t know? Then you’re xeniatrophobic.

11. XENIUM

A xenium is a gift or offering given to a stranger, which in its native Ancient Greece would once have been a lavish feast or a refreshing spread of food and fruit. In the 19th century art world, however, xenium came to refer to a still-life painting depicting something like a extravagant display of food or a bowl of fruit.

12. XENIZATION

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A 19th century word meaning “the act of traveling as a stranger.”

13. XENOCRACY

A government formed by foreigners or outsiders is a xenocracy. A member of one is a xenocrat.

14. XENODOCHEIONOLOGY

Defined as “the lore of hotels and inns” by Merriam-Webster.

15. XENODOCHIUM

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A guesthouse or hostel, or any similar stopping place for travelers or pilgrims.

16. XENODOCHY

A 17th century word for hospitality. If you’re xenodochial then you like to entertain strangers.

17. XENOGLOSSY

The ability to speak a language that you’ve apparently never learnt.

18. XENOLOGY

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The scientific study of extraterrestrial phenomena is xenology. The study of extraterrestrial life forms is xenobiology.

19. XENOMANIA

The opposite of xenophobia is xenomania or xenophilia, namely an intense enthusiasm or fondness for anything or anyone foreign.

20. XENOMORPH

Something unusually or irregularly shaped is a xenomorph—which is why it’s become another name for the eponymous creature in the Alien film franchise.

21. XENOTRANSPLANTATION

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Transplanting organic matter from a non-human into a human (like a pig’s heart valve into a human heart) is called xenotransplantation. Whatever it is that’s transplanted is called the xenograft.

22. XERIC

An ecological term used to describe anywhere extremely dry or arid. If it’s xerothermic, then it’s both dry and hot.

23. XERISCAPE

If you live in a xeric area, then you’ll have to xeriscape your garden. It’s the deliberate use of plants that need relatively little moisture or irrigation to landscape an arid location.

24. XEROCHILIA

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The medical name for having dry lips. Having a dry mouth is xerostomia.

25. XEROCOPY

A xerographic copy of a document—or, to put it another way, a photocopy.

26. XEROPHAGY

The eating of dry food is xerophagy. It mightn’t sound like it, but it was originally a religious term.

27. XESTURGY

The proper name for the process of polishing.

28. XILINOUS

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Something described as xilinous resembles or feels like cotton …

29. XIPHOID

… while something described as xiphoid resembles a sword.

30. XOANON

Derived from the Greek for “carve” or “scrape,” a xoanon is a carved idol of a deity.

31. XTAL

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An abbreviation of “crystal,” according to the OED.

32. XYLOGRAPHER

A 19th century word for a wood engraver.

33. XYLOID

Why say that something is “woody” when you can say that it’s xyloid?

34. XYLOPOLIST

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A 17th century formal name for a timber merchant.

35. XYLOTOMOUS

Describes anything or anyone particularly good at wood-cutting or wood-boring.

36. XYRESIC

Means “razor-sharp.”

37. XYROPHOBIA

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The fear of being close to or touching sharp implements.

38. XYLANTHRAX

Nowhere near as nasty as it sounds, this is just an old name for what we now call charcoal.

39. XYSTUS

A type of covered walkway or portico.

40. X.Y.Z.

Late 19th century slang for a journalist who takes on any work going, or else 18th century slang for a dandyish or “exquisite” young man.

What’s the Difference Between Forests, Woods, and Jungles?

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Jui-Chi Chan/iStock via Getty Images

If you're an English speaker, there’s a good chance you often use the words woods, forest, and jungle correctly without even thinking about it. Even if a patch of trees takes up a significant portion of your backyard, you probably wouldn’t consider it a forest; and you wouldn’t talk about the beautiful fall foliage in New England’s jungles. Based on those examples, it seems like woods are smaller than forests, and jungles aren’t found in colder climates. This isn’t wrong—but there's more to it than that.

According to Merriam-Webster, a forest is “a dense growth of trees and underbrush covering a large tract,” while woods are “a dense growth of trees usually greater in extent than a grove and smaller than a forest.” The reason we consider forests to be larger than woods dates back to the Norman rule of Great Britain in 1066, when a forest was a plot of land owned by the Crown that was large enough to accommodate game for royal hunting parties. Whether that land contained trees or not was essentially irrelevant.

These days, scientists and land managers definitely consider the presence of trees necessary for land to be classified as a forest. To set it apart from woods, or woodland, it usually has to meet certain density qualifications, which are different depending on whom you ask.

According to the UN Food and Agricultural Organization (FAO), a forest must cover about 1.24 acres of land, and its canopy cover—the amount of land covered by the treetops—must exceed 10 percent of the acreage [PDF]. “Other wooded land” must also span about 1.24 acres, but its canopy cover is between 5 and 10 percent. In a nutshell, the FAO thinks forests and woods are the same size, but forests are more dense than woods. Australia, on the other hand, employs plant ecologist Raymond Specht’s classification system for its vegetation, in which any tree-populated land with less than 30 percent canopy cover is a woodland, and anything more dense than that is a forest.

Unlike forests, jungles don’t have specific scientific classifications, because the word jungle isn’t really used by scientists. According to Sciencing, it’s a colloquial term that usually denotes what scientists refer to as tropical forests.

Tropical forests are located around the Equator and have the highest species diversity per area in the world. Since they’re so densely populated with flora and fauna, it makes sense that both Merriam-Webster and the Encyclopedia Britannica describe jungles as “tangled” and “impenetrable.” They’re bursting with millions of plants and animals that are different from what we see in temperate and boreal forests to the north.

Because most of us aren’t in the habit of clarifying which type of forest we’re talking about in casual conversation, it’s no surprise that we often refer to the temperate forests we see in our own climate simply as forests, which we differentiate from those rich, overgrown tropical territories to the south by calling them jungles.

To summarize, forests are historically and colloquially considered to be larger than woods, and scientifically considered to be more dense. Jungles are technically forests, too, since jungle is a casual word for what scientists call a tropical forest.

And, all differences aside, it’s relaxing to spend time in any of them—here are 11 scientific reasons why that’s true.

Have you got a Big Question you'd like us to answer? If so, let us know by emailing us at bigquestions@mentalfloss.com.

5 Benefits of Sarcasm, According to Science

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Writing of her future demise, author and humorist Dorothy Parker once observed that her epitaph might read, “Wherever she went, including here, it was against her better judgment.”

Celebrated for her scathing wit and wordplay, the late Parker might agree that sarcasm held tangible benefits. Doled out with care, ironic remarks—usually defined as communication that humorously conveys your intent through language that appears to be the opposite of what you mean—can amuse friends, lighten the mood, or broadcast your wit. But there’s more to sarcasm than simply eliciting a laugh. It turns out that the perks of your caustic muttering might have some scientific support. Take a look at a few peer-reviewed consequences to your snappy comebacks.

1. Sarcasm and humor might make you appear more confident, particularly at work.

In a 2016 paper published in the Journal of Personality and Social Psychology, researchers evaluated adults on their responses to some candid remarks about fictional pet food and travel companies, among other subjects. Those with zingers were perceived as having more competence and confidence. “The successful use of humor—telling jokes that are funny and appropriate—can raise your status because it makes you appear more confident and more competent,” says co-author Thomas Bitterly, a postdoctoral research fellow at the University of Michigan's Stephen M. Ross School of Business. “Confidence and competence are two of the key traits that determine whether we give someone status. The reason for this is because we want the individuals who have influence in a group to be those who are capable of leading it.”

Humor and sarcasm work to reinforce these traits, Bitterly tells Mental Floss, because humor itself is a risk. “Before we tell a joke, especially to people we do not know well, it’s difficult to know with certainty if our audience will find it funny and appropriate. If they find it unfunny and inappropriate, they will think that we lack competence and we will lose status. Given that humor is risky, telling a joke signals confidence,” he says.

2. Sarcasm can improve creativity.

In a 2015 paper [PDF] published in Organizational Behavior and Human Decision Processes, researchers (including those at Harvard and Columbia business schools) made the case for sarcasm facilitating creative thinking. In a series of experiments, participants gave or received positive, neutral, or sarcastic responses with a partner. Those in the sarcastic groups performed better at creative tasks—like problem-solving on paper—after the fact.

"This is because both sarcasm construction and sarcasm interpretation are conducive to abstract thinking, a key cognitive precursor to creative thinking," lead author Li Huang, an assistant professor of organizational behavior at INSEAD, tells Mental Floss. Huang points to a common sarcastic comment aimed at someone wasting time in the workplace: "Don't work too hard." The intended meaning is likely to "work harder." Both the speaker and recipient benefit, Huang says, because both need to process the underlying message. The speaker must translate the admonishment to sarcasm, and the recipient has to consider what the speaker really meant. That abstraction fosters creative thinking because creativity is needed to discern the truth and not the literal meaning of the statement.

"In this way, to construct or interpret sarcasm is to traverse the psychological distance between the stated and the intended meaning through abstract thinking," Huang says.

There is one word of caution: Sarcasm tends to have this effect when it’s lobbed between two parties who know and trust one another. With strangers, it might simply come off as rude or confusing.

3. Sarcasm can make criticism seem almost pleasant.

Want to offer some constructive commentary without feeling like a jerk? In a 2016 paper published in the Journal of Speech, Language, and Hearing Research, co-author Melanie Glenwright, an associate professor of psychology at the University of Manitoba, examined how adults and children interpreted sarcastic commentary. The generally agreeable reactions by adults to criticism indicates it can be wrapped in an amusing remark that reduces the chance for the listener to feel offended.

“The use of indirect language allows the speaker to criticize the addressee indirectly which is perceived as more polite than a direct, literal insult,” Glenwright tells Mental Floss. "Speakers may use sarcasm to deliver insults in professional or social settings where they want to criticize another person in a less-harsh manner.”

4. Sarcasm can make for better social bonding.

When we pass along a humorous observation and someone agrees with it, we’re strengthening our bond with that individual, according to Glenwright. “[Sarcasm] improves social bonding between the speaker and the addressee,” she says. “Sarcasm can also be used to convey humor and jocularity which can improve mood both in the speaker and addressee.”

5. Sarcasm might make you appear more intelligent.

Sarcasm and humor alike share a common trait: They require creative thinking that’s rapidly deployed to analyze a situation. Depending on the company, Bitterly says that a clever retort could potentially have people thinking more highly of you. “Saying something that is funny and appropriate is difficult,” he says. “It requires being able to recognize an opportunity for humor—'did someone just say something I know a funny response for'—[and] being able to quickly generate or recall a funny response and being able to predict how the audience is going to respond. On top of those things, delivery and timing also matter …. We tend to view people who manage to successfully pull off all of these things as being more intelligent, and we see that reflected in the way we refer to them.”

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